6.11-stable review patch. If anyone has any objections, please let me know.
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From: Mario Limonciello mario.limonciello@amd.com
[ Upstream commit 67c08d303e0a1a5665b3f198037c9fae2d808090 ]
When boost is changed the CPPC value is changed in amd_pstate_cpu_boost_update() but then changed again when refresh_frequency_limits() and all it's callbacks occur. The first is a pointless write, so instead just update the limits for the policy and let the policy refresh anchor everything properly.
Fixes: c8c68c38b56f ("cpufreq: amd-pstate: initialize core precision boost state") Reviewed-by: Gautham R. Shenoy gautham.shenoy@amd.com Reviewed-by: Perry Yuan perry.yuan@amd.com Tested-by: Dhananjay Ugwekar dhananjay.ugwekar@amd.com Link: https://lore.kernel.org/r/20241012174519.897-2-mario.limonciello@amd.com Signed-off-by: Mario Limonciello mario.limonciello@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/cpufreq/amd-pstate.c | 24 +----------------------- 1 file changed, 1 insertion(+), 23 deletions(-)
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 929b9097a6c17..62ae4ff290379 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -698,34 +698,12 @@ static void amd_pstate_adjust_perf(unsigned int cpu, static int amd_pstate_cpu_boost_update(struct cpufreq_policy *policy, bool on) { struct amd_cpudata *cpudata = policy->driver_data; - struct cppc_perf_ctrls perf_ctrls; - u32 highest_perf, nominal_perf, nominal_freq, max_freq; + u32 nominal_freq, max_freq; int ret = 0;
- highest_perf = READ_ONCE(cpudata->highest_perf); - nominal_perf = READ_ONCE(cpudata->nominal_perf); nominal_freq = READ_ONCE(cpudata->nominal_freq); max_freq = READ_ONCE(cpudata->max_freq);
- if (boot_cpu_has(X86_FEATURE_CPPC)) { - u64 value = READ_ONCE(cpudata->cppc_req_cached); - - value &= ~GENMASK_ULL(7, 0); - value |= on ? highest_perf : nominal_perf; - WRITE_ONCE(cpudata->cppc_req_cached, value); - - wrmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, value); - } else { - perf_ctrls.max_perf = on ? highest_perf : nominal_perf; - ret = cppc_set_perf(cpudata->cpu, &perf_ctrls); - if (ret) { - cpufreq_cpu_release(policy); - pr_debug("Failed to set max perf on CPU:%d. ret:%d\n", - cpudata->cpu, ret); - return ret; - } - } - if (on) policy->cpuinfo.max_freq = max_freq; else if (policy->cpuinfo.max_freq > nominal_freq * 1000)